So something I've been wondering about for a while, is where the best place to clip a grounding strap when working on a PC. Can you clip it to just the case and be fine, or do you have to install the PSU, plug it in to an outlet, then clip to the case? On that note, as long as you're grounded, does it matter if you're standing on carpet as you assemble/work on your rig, as long as it isn't on the carpet/floor?